Larix kaempferi is a tree with a major economic impact and is processed in large quantity every year in Korea. This study was carried out to collect basic data for the reasonable use of Larix kaempferi and to investigate the relation between anatomical properties and modulus of rupture (MOR) for heartwood and sapwood. As the length of earlywood tracheid and the radial wall thickness of earlywood tracheid and latewood tracheid increased, the modulus of rupture (MOR) increased, but decreased with increasing microfibril angle. Statistical analysis by the stepwise regression technique shows that the main factors affecting the modulus of rupture (MOR) of heartwood are the microfibril angle and the radial wall thickness of latewood tracheid, while those affecting MOR of sapwood are the length of earlywood tracheid and the microfibril angle.

생쥐의 난자는 특별한 첨가물이나 난구세포 없이 체외 배양해도 성숙율이 높은 반면 돼지 난자의 체외성숙율은 매우 낮다. 본 연구는 이러한 차이의 원인을 연구하기 위하여 생쥐와 돼지 난자의 에너지 생성에 관여하는 유전자인 malate dehydrogenase(Mor2)의 기능을 RNAi를 이용하여 비교 분석하였다. 생쥐와 돼지 각각의 Mor2 double-stranded RNA(dsRNA)를 제작하고, 생쥐는 난구세포를 제거한 미성숙(GV) 난자의 세포질에